Means for flushing drains and sewers.



ND- 763,641. PATENTED JUNE 28, 1904.

I. SHONE & B. AULT. MEANS FOR FLUSHING BRAINS AND SBWERS.

AP PLIOATION FILED MAY 13, 1902.

UNITED STATES Patented June 28, 1904.

PATENT OFFICE.

MEANS FOR FLUSHING DRAINS AND SEWERS.

SPECIFICATION forming part of Letters Patent No. 763,641, dated June 28, 1904.

Application filed May 13, 1902. Serial No. 107,176

To all whom it may concern.-

Be it known that we, IsAAo SHONE and ED- WIN AULT, subjects of the King of Great Britain, residing at Westminster, in the county of Middlesex, England, have invented new and useful Improved Means for Flushing Drains and Sewers, of which the following is a specification.

This invention is applied, first, in connection with the utilization of the waste liquids from a house such as those from the watercloset, the sink, the bath, and other sanitary appurtenances of a house with or without the rain-water from the roof or other surfaceand, secondly, it is applied in connection with the utilization of the sewage in a public sewer, in both cases for the purpose of effecting a powerful flushing action of a drain or sewer. In the first case we moreover considerably reduce the amount of potable water necessary for flushing purposes. The sewage-discharges from a house or from a tributary or high-level sewer we collect into a tank which with our improved construction of siphon forms the subject of our invention and may be called a flushing-ejector, having the function of flushing a drain by the waste liquids from the house or of flushing a sewer lying at a lower level by the sewage from a sewer lying at a higher level.

Figure 1 of the accompanying drawings is a sectional elevation of part of a sewage-collecting tank and a siphon, and Fig. 2 a plan of the siphon. Figs. 3 and 4 are sectional elevations of the siphon for explaining its proportions, and Fig. 5 a sectional elevation of a modified form of siphon.

A is a tank wherein the sewage from a house or from a high-level or tributary sewer is collected. This tank is at its lower part connected with the short legs B and G of a duplex siphon, having the long legs D and E terminating at the point X in a trap F, the rising exit-pipe of which leads to the discharge-pipe G to the house-drain or public sewer and may, as shown, project above the bottom of the drain or sewer G. H is a usual intercepting or inspection chamber.

The two sides or members of the duplex siphon may or may not be similar in form;

(No model.)

but the necessary conditions are, first, that to the other short leg, as shown, and, secondly, that the forms and sizes of the sides or members of the duplex siphon shall be such as tov enable sewage and other waste liquids and matters to be discharged or ejected fromboth sides or members of the siphon.

Siphons which depend for their certainty of action upon the employment of small auxiliary pipes and like contrivances are only operative with clean water or liquids free from solid matters, as they would quickly become clogged if employed for the ejection or discharge of sewage. This invention enables sewage to be ejected with as much certainty as liquids free from solid matters. Fig. 5 shows another example or form of siphon where, however, the same principle is carried out with respect to the short legs B and C.

Another feature of our invention is that the upper edge or crown of junction of the long legs D and E, as shown at Z, Fig. 1, is at a lower level than that of the entrance to the lower short leg C, so that the said leg C shall continue in action after air has commenced to enter the higher short leg B and until air begins to enter by the lower short leg 0.

We also adjust the capacity of the short legs so that the proper quantity of air shall be inclosed therein, which when compressed shall allow the liquid to rise within the short legs to or near the lip Y of the siphon at or about the time that the water seal in the trap F is' forced, so that the liquid shall be in such a position within the short legs as to be ready to fill the upper bends of the duplex siphon when air is forced through the water-trap F, and thus to insure theefficient starting of the siphonage action.

In the carrying out of our invention the siphon is made with passages of such a minimum size as will enable liquid wastes or sewage from a house or sewer to be utilized for the purpose of flushing drains or sewers, and we may say that to the best of our knowledge no other siphon has as yet been produced that could deal effectively with sewage.

Fig. 3 represents by the section-lines the capacity of the part of the siphon between the top of the seal and the bottom of the upper short leg, and Fig. 4 shows the capacity of the part of the siphon between the lip Y of the siphon and the bottom of the seal. These capacities must bear a certain relation which depends'upon the depth of the seal; but it must be such that when the air inclosed in the siphon is compressed by the rise of the liquid in the tank A to the extent of depressing the water in the seal to its lowest level the liquid in the duplex short legs shall rise to or near to the lip Y, so that the moment the compressed air escapes through the seal the liquid in the short legs shall be ready to charge the upper bends of the'siphon, and so start the siphonage.

From Fig. 1 it will be seen that the inlet to C is flush with the floor of the tank A in order that the latter may be entirely emptied and no sediment accumulate there.

The action is as follows: hen the air in the duplex siphon is compressed suflicien-tly by the rise or accumulation of sewage in the flushing ejector or tank A, the seal in the trap F will beforced and the siphon action started by the sudden release of air from the long legs D and E, and the liquid from the tank will enter the discharge-pipe Gr, leading to the house-drain, (or the public sewer, as the case may be,) until the tank is almost emptied, whereupon air will enter the higher entrance or short leg B and break the action of that side of the siphon, while the other leg, C, having a lower entrance, will continue in action until in turn its action is stopped by the entrance of air into the long log E by way of the open legs B and D and the complete restoration of atmospheric equilibrium in the whole .siphon is insured.

The object and advantage of having the inlets oi' the duplex siphon at different levels is to insure the perfect siphonage, breaking, or restoration of atmospheric equilibrium in the siphon at the end of a flush. A single siphon is always liable to imperfect restoration of atmospheric equilibrium, owing to the inlet becoming sealed by a wave or wash of water closing the inlet before sufficient air can enter at the close of a flush.

What we claim as our invention, and desire to secure by Letters Patent, is

A sewage-ejector comprising two contiguous siphonic members, each of which has a long and a short leg, the short leg of each member of less sectional area than the long leg, atrap to which the long leg of each siphonic member is connected and a horizontal extension provided with aninlet-opening in its upper wall on each short leg, substantially as set forth.

Witnesses:

W. M. HARRIS, V. JENSEN. 

